Reliability analysis for continuous operation system in nuclear power plant

Probabilistic safety assessment(PSA) is a systemic engineering evaluating technology, having been widely used in the field of nuclear power plant safety evaluation, it reacts on improving safety of nuclear power plant significantly. Along with the nuclear technology development and application, dynamic characteristic of system is more and more important to the plant safety analysis. From 1980's,several kinds of dynamic reliability analysis methods have been proposed, among these methods, Monte Carol Simulation(MC) and Dynamic Discrete Event Tree(DDET) are the two of the most promising ones, and they have advantages and disadvantages respectively. A new method combining the two methods is proposed in this paper, and system reliability analysis is made for continuous operation system in nuclear power plant. Based on the comparison with the result of fault tree(FT), program validation is proved, and applicability of the dynamic reliability analysis and FT is simply analysed.